1、AECMA STANDARD prEN 4408-6 Edition P I June 2002 NORME AECMA AECMA NORM PUBLISHED BY THE EUROPEAN ASSOCIATION OF AEROSPACE INDUSTRIES - STANDARDIZATION h?! Gulledelle 94 - 8-1200 Brussels -Tel. + 32 2 775 81 10 - Fax. + 32 2 775 81 11 - www.aecma-stan.org ICs: 28 June 2002 ENGLISH VERSION AECMA-STAN
2、 Guiiedelle 94 8-1200 BRUXELLES Aerospace series Technical drawings Representation of parts made of composite materials Part 6: Preforms Srie arospatiale Dessins techniques Reprsentation des articles en matriaux composites Partie 6 : Prformes Luft- und Raumfahrt Tech ni sc he Zeichnung en Darstellun
3、g von Teilen aus Verbundwerkstoffen Teil 6: Vorformen This “Aerospace Series Prestandard has been drawn up under the responsibility of AECMA-STAN (The European Association of Aerospace Industries - Standardization). It is published on green paper for the needs of the European Aerospace Industry. It
4、has been technically approved by the experts of the concerned Domain following member comments. Subsequent to the publication of this Prestandard, the technical content shall not be changed to an extent that interchangeability is affected, physically or functionally, without re-identification of the
5、 standard. After examination and review by users and formal agreement of AECMA-STAN it will be submitted as a draft European Standard to CEN (European Committee for Standardization) for formal vote. Nota - Extra copies can be supplied by B.N.A.E. - Technopolis 54 - 199, rue Jean-Jacques Rousseau - 9
6、2138 ISSY-LES-MOULINEAUX CEDEX Edition approved for publication Comments should be sent within six months after the date of publication to r I I - Procedure and Process Domain Copyfight 2002 O by AECMA-STA Page 2 prEN 4408-6: 2002 Foreword This standard has been prepared by former AECMA-CN CO and wa
7、s reviewed by the Domain Technical Coordinator of AECMA-STANS Process Domain . Contents 1 2 3 4 4.1 4.2 4.3 4.4 4.5 Annex A Annex B Scope Normative references Terms and definitions . Representation of preforms on drawings . . Representation of 2, 5 D multilayers Representation of rosettes Representa
8、tion of brai (informative) Example of the representation of 2, 5 D weaving Representation of nDs Representation of woven and cowoven parts . (informative) Bibliography . . . Page 3 3 3 4 4 5 6 6 8 10 12 Page 3 prEN 4408-6: 2002 I Scope This standard specifies the rules for the representation of pref
9、orms of composite materials as well as the information to be indicated in the technical drawings. It is applicable to aerospace structures using preforms. It shall be used together with EN 4408-1. 2 Norm at ive ref e re n ce s This European Standard incorporates by dated or undated reference, provis
10、ions from other publications. These normative references are cited at the appropriate places in the text and the publications are listed hereafter. For dated references, subsequent amendments to or revisions of any of these publications apply to this European Standard only when incorporated in it by
11、 amendment or revision. For undated references the latest edition of the publication referred to applies. EN 4408-1 Aerospace series - Technical drawings - Representation of parts made of composite materials - Part 1 : General rules 1) 3 Terms and definitions For the purposes of this standard the te
12、rms and definitions given in EN 4408-1 and the followings apply : 3.1 braided tubular or plane shape obtained by a balance intertwining of continuous threads 3.2 braided into shape braided with a mandrel 3.3 cowoven (hybrid fabric) fabric made of different types of threads (e.g. carbodaramid hybrid
13、fabric) 3.4 cowoven into shape woven into shape and made of different types of threads 3.5 level elementary structure of one layer in the weft or warp direction 3.6 multilayer (2,5 D) fabric the weft threads of which cross several levels of warp but not all of them 3.7 nD oriented multidirectional r
14、einforcement (industrial copyright) 1) Published as AECMA Prestandard at the date of publication of this standard Page 4 prEN 4408-6: 2002 3.0 preform name given to different stage of all part of the item prior to obtaining the required composite material 3.9 rosette circular piling of staggered lay
15、ers of the direction with a recovering 3.10 woven plane siiaee obtained by assembling intertwined threads which forms a definite framework 3.1 I woven into shape any non plain shape woven with or without the use of a shaping tool 4 Representation of preforms on drawings It would appear to be difficu
16、lt to characterise preforms due to: - their complexity; - the different ways of obtaining them. Examples of the representation of the cases encountered are given below: 4. I The rules for the representation are those of lapped with, in addition, clear indications of parameters such as: Representatio
17、n of 2,5 D multilayers - the number of intertwined layers; - the drawing of the repeated motif made up of the different levels; - the quantity of threads warpwise and weftwise; - etc. An example of the representation of 2,5 D weaving is illustrated in annex A and an example of the representation of
18、2,5 D multilayers is given in figure 1. In a reinforcement of the 2,5 D type the fibres are intertwined in a similar manner to those of a classic 2 D fabric, except that the warp threads may be intertwined with several layers made up of weft threads. This type of intertwining allows the different ba
19、sic geometries of preforms to be made up. These variations depend: - on the number of intertwined layers; - on the repeated motif; - on the number of threads placed along the diagonal. The representation on drawings shall clearly and concisely use these definition parameters to guarantee the designe
20、rs requirements. Page 5 prEN 4408-6: 2002 Cross-sections of the different sections Arial view of the layer 1 6 10 15 19 24 Warp - - an associated braiding table which identifies the area where the braiding angle undergoes changes. Key 0 Type of fabric Q 20“ (SI) to 22“ (S2) 0 22“ (S3) to 35“ (54) 35
21、“ (54) to 40“ (S5) Page 7 prEN 4408-6: 2002 111 7 NOTE In the example, the O“ warp corresponds to the parts axis. Figure 3 - Braiding into shape BRAIDING TABLE Figure 4 Page 8 prEN 4408-6: 2002 DESIGNATION 4.5 The representation rules used are those for draped items and seams with which the followin
22、g symbols are associated (see table 1 and figures 5 and 6): Representation of woven and cowoven parts SYMBOL Table 1 i-i AI T I Figure 5 NOTE GRAFT AREA Key Q first grafting operation second grafting operation Page 9 prEN 4408-6: 2002 Dimensions in millimetres GRAFTING TABLE LAY-UP DIAGRAM h 0 WARP
23、4 Figure 6 Page 10 prEN 4408-6: 2002 Annex A (informative) Example of the representation of 2,5 D weaving Dimensions in millimetres LE TE SEE END OF PLIES VIEW SEE WARPWISE VIEW b A12 b END OF PLIES VIEW WARPWISE VIEW 12 3 4 5 6 11 2 3 4 5 6 1 N5 ) N6 ) Key 2,5 D weaving is the addition of levels NI
24、, N2, N3, N4, N5 and N6. These levels show the order and the course of the weft threads and the warp threads. Marking threads in polyester. To be completed with the definition of the material (fibre, texture, etc.). 0 = weft thread o = warp thread for one laver onlv LE Leading Edge TE Trailing Edge
25、Figure A.l Page 11 prEN 4408-6: 2002 B 6 238 1,48 y- Y 5 257 1,48 y- Y 4 278 1,48 y- Y 3 297 1,48 y- Y Dimensions in millimetres 2 3131.48 13271,48Y Al Y - - - - - - - - - - - - - - - - - - - Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y A2 A3 A4 A5 A6 A7 A8 A9 A10 All A12 A13 A14 A15 A16 A17 A18 A1
26、9 A20 A21 A22 A23 11 10 10 10 9 10 12 12 13 16 20 67 25 17 16 10 11 10 A layer (C) of type Y is made up of a 48 K weft thread and a 48 K warp thread linking (C) to (C-I). A layer (C) of type - is made up of a 48 K weft thread and a 48 K warp thread linking (C) to (C-I) and a 48 K warp thread linking
27、 (C) to (C+l). 11 10 9 6 3 Figure A.2 Page 12 prEN 4408-6: 2002 EN 4408-1 EN 4408-2 EN 4408-3 EN 4408-4 EN 4408-5 Annex B (informative) Bib I i og rap hy Aerospace series - Technical drawings - Representation of parts made of composite materials - Part 1 : General rules Aerospace series - Technical
28、drawings - Representation of parts made of composite materials - Part 2: Laminated parts Aerospace series - Technical drawings - Representation of parts made of composite materials - Part 3: Parts including core materials Aerospace series - Technical drawings - Representation of parts made of composite materials - Part 4: Items obtained by winding Aerospace series - Technical drawings - Representation of parts made of composite materials - Part 5: Seams
